SMUGGLER Manga

スマグラー

From Tokyopop:
The smugglers in our tale--guys who have to clean up the bodies after mob assassinations in which heads get ripped off--are a cold-hearted silent veteran, an old man, and a young guy forced to do dirty work to pay back money he owes the mob.
When the young smuggler makes a mistake by allowing a captured rival to escape, the price he must pay for his error gets horrifically high...

The series Smuggler has been licensed, it is not available in Manga Fox.